Using Trinity with Squeeze.

I am about to install Trinity on Squeeze (Debian 6.0.4) for a client. I have a complete copy of /home on the old version: Lenny (Debian 5). The end of security support for Lenny precipitated this. I am anxious about settings and data, and am hoping that TDE has reached the stage where it is truly usable by the non-expert user. My husband was due to be the guinea-pig, poor man, but was using LXDE during the mirror problems and opted to stay where he was. I installed Squeeze and TDE for myself, but managed to mess up my mail in KMail, and retreated (temporarily) back to Lenny and KDE 3.5.10. So - any advice? The KDE configurations will almost certainly be a problem. Any advise on how to rename them _before_ I mess everything up. I have been Googling. It wasn't reassuring! See, e.g., http://lxer.com/module/forums/t/31333/ . It was also not much use. I am very happy to RTFM if some kind soul would point me to the FM. I can't find it. And I should be delighted at LMGTFY - my Google-foo, in so far as it ever existed, seems to have deserted me! Thanks, Lisi