You can remove a cane at any time.Or part of same.Wound bigger than a nickel[remember them?] I suggest covering with nail polish top coat if it will be there next year.

Those three roses will all put out more blooms next spring on the canes you are willing to cut back.
Are you sure that the new growth will make it through winter in your area? If not, cutting the long canes back could mean that there's no spring bloom, especially if the roses bloom on old wood.
Pete now gardens where winter damage to roses seldom exists. Where winter can take out canes and roses is a whole different world.

i am not sure what your weather is, but if your "5" means cold winters, i would probably delay the pruning till the spring. why take wood and leaves that are alive (and are part of the photosynthesis process, even if it is just a little) + create a wound that may not have time to heal properly before cold weather +possibly boost the younger shoots which could result in overgrown softer canes that would be less apt to fight the winter?
...mind you, if your shrub is healthy there is no reason that taking a couple old canes any time in the year would harm it. i would give it a good dressing of a really good quality compost, or a fresh mulch and water it if the weather gets really hot (but not too much to not overstimulate the young shoots)

You could do some maintenance pruning, but severe pruning back to a foot or so would probably cost you a lot of next year's blooms on the once-bloomer (CdR), and may compromise the health of the repeat bloomers over winter.

RdR and RdV will likely get some winter die back, so you want them to go into winter with as much good cane as possible. Again, maintenance pruning only. Btw, I don't know about RdV, but RdR loves the autumn and you'll be getting blooms in September/October.

The Cardinal, being a Gallica hybrid, might be more forgiving, but a severe pruning still would not be a great idea, especially if the plant is supporting lots of new growth right now.

Wait for spring for the repeaters (RdR and RdV). You'll be pruning off some die back anyway, unless you have a very mild winter.

For CdR a light pruning in the spring, if you must, but it's usually better to wait until after it blooms to do serious pruning, letting it have the rest of the growing season to recover.

All the best!

ok, so let's say I leave them all alone. So, come this late fall, I convince the long canes to lay down, in order to get the hemlock cover on them before snow fall. And then, next spring, prune everything into attractive rounded shrub? I guess I don't know why I don't take off the eccentric long canes now, since the rest of the plant is so healthy. What do I gain by leaving them on? Maybe I lose some bloom in 08, but won't the spring start on what is left give me a more vigorous , shapely rose for 09?

I would remove or cut back the long canes now. Yes you will be losing whatever will bloom on them next spring, but what does it matter if the canes look awkward?

The reason we in the north are told not to prune in late summer/fall is because we don't want to encourage new growth that will get zapped by the upcoming cold temps. I have taken out canes at this time of year and even into Sept., and my roses still seem to go dormant in time with the gradually cooling weather, so I'm not sure it matters. I certainly wouldn't start going through all my roses at this time of year and prune to shape, but removing the occasional whippy cane isn't going to make or break the rose.

Besides, the tall canes will likely get whipped around by the winds, maybe snap anyway when the winter storms come.