can u cut longer interconnects and reterminate?

If it is a cable that you went to great lengths to match to your system then I'd recommend that you let the company do it. Both for the reason mentioned by Elizabeth as well as the fact that you will get a matching RCA, solder and terminating technique of the original cable, all of which can effect the sound of the cable.

If it is less critical cable it should be no problem, although some IC's use varnished wire strands so you will have to use a higher heat to burn off the varnish first so it will then accept the solder.

I would send it back to the MFR. to have it re-terminated or sell it and buy shorter lengths. What type of cable?

Send it back to the mfr to re-terminate if you want to pay the premium and want to preserve resale.
BUT, If you don't feel capable of doing it yourself, save your money, buy whatever connector suits your fancy and bring it to a tech who will charge a fraction of what the mfr will charge. Yes, resale MAY be killed but you can end up with a superior interconnect if you use superior connectors.
I say DIY. It is not rocket science. It can be tedious but it is not impossible. And, FYI, I've seen some of the boutique cable guys with solder terminations that I would be embarrassed about. ymmv...

This also depends on what cable you have, the cost, and resale value of the cable. If you bought the cable at Radio Shack you should return there to buy a soldering iron and some connectors.

If it was expensive cable with significant resale value I would have it factory re-terminated.

thanks guys = the cable is the kubala emotion- since I have changed my system i thought I could cut these and re terminate for use in my preamp and the run to my powered speakers- Alot cheaper than buying new cables- the company will not cut and reterminate the cords so I would have to have a tech do it-thanks