Glad you're interested in Sins modding. While it's far from a complete resource, the sins modding wiki might be able to help you with basic questions. Otherwise the community is pretty good at answering questions (provided we actually know the answers of course).

As for modeling, you should be able to do everything you need with freeware. I think Sins meshes use the .xsi format, so you'll need to find a 3d modeling program that can support it (you might need plug-ins). The documentation with the forge tools in the download section has some more detailed information about this, but keep in mind the reference data is out of date.

ok thats good to know what freeware programs would be best i could only find the Autodesk Softimage programs to make ths xsi files i found that i can access the info on the enity files with note pad and edit those slowly working out the info on that and how would some one make new techs to use with pirates and fix the lables that say what it is?

hi im way new i would love toknow how to get a mods downloaded ???

Or just look at the mod topics here on this forum board. Most of the ones still in active development (and thus for the most recent versions) should be on the first few pages.