Yes, copy Karajorma's signature somewhere and you'll have all the modding info you need. To solve your problem with Modelview, get Modelview High Limits, you'll find it on Karajorma's site.
Some programs you will want (look them up on Google or FSWiki):
VPMage
VPVIEW
Notepad, of course
FS2 is great for modding. It's very simple, you'll figure it out quickly. Download VPVIEW and browse your game VPs. Look for the table files, as these let you do pretty much anyting. Extract a table and edit it in Notepad, then place it in your \data\tables directory. For example, if you want to change the Subach texture, edit weapons.tbl, type in a new texture file under the Subach entry, and when you play the game with your new weapons.tbl in the \data\tables folder, you'll have modded Subachs. Adding models, textures, interface graphics, etc. is basically the same thing, just put them in the relevent \data folder. VPMage will allow you to build a VP file out of these modded files, if you want to.
Basically, FreeSpace modding is pretty intuitive, and it's best if you learn it on your own. Download the files I listed above and play around with them for a month or so, you'll learn quickly.