It is interesting to read that almost everyone uses different ways to achive what they want.
That heavily depends on the currently used program and its familiarness to the individual.
Nevertheless, it is very interesting to see different/other ways to come from A to C.
I am a little suprised that noone mentioned Sajts "qwalk" yet:http://icculus.org/qshed/qwalk/
It converts easy and quick between mdl, md2 and md3
(except export to md3, which does not work yet)
Maybe it is a less known tool ...
Regarding leileilol´s sprite question:
I saw a convertion from md5 to sprite (a Doom2 mod uses it).
It converted all D3 weapons and other models into Doom2 sprites:http://www.moddb.com/mods/doom-3-weapon ... d-patch-47
I also saw a blender plugin that could export sprites.
But I am a too big noob at these things to be able to really help you.
Maybe this link does help you with spr2 ?http://www.atelierquebec.ca/iffsnooper/ ... prite.html