Uninstalling mods and upgrading

[qryztufre]

I have several mods installed and I no longer want them. I am also running a slightly older version of vB (3.6.x) and plan on upgrading to the latest version (3.7).

So, I'm wondering what would be the best way to get rid of all the mods and upgrade the forum. (and keep in mind I am clueless about it all, and was NOT the one that installed the mods).

If I just run the upgrade scripts, what happens to the mods? Will leaving them laying about bother the the way the rest of the forums work? If so, how do I "fix" that?

Maybe do a fresh install and import the data with Impex?

If I should uninstall the mods first, what is the best way to get rid of them?

In the end, I want a CLEAN install of vBulletin with NO mods. The only thing aside from straight vB is a few template changes (custom footer, Adsence ads, custom menu) and I can do all those things without issue....it's just that I'm rather clueless once I leave the ACP.