Looking at the views (46 in total) l I'd say look for other threads where ppl aks somewhat the same questions.
A lot MOD's only work with version 1.5 and if you want to try a MOD read the README (mostly included in the MOD DL) if your still uncertain you can ask in the appropriate tread and you'll most likely get a answer.
If for some reason a specific DL link doesn't work you can always ask someone to share it with you or point you in the right direction.
Most ppl use TMO 2.5 with RSRD or RFB with RSRD, some only use TMO 2.5 and some only RFB others like FOTRS yet others like OM or GFO, OTC is a must but doesn't work with all MOD's , some have a MOD soupe which is so off the main stream its not even worth metioning (just kidding guy's
)
One things for sure practically everybody works with JSGME.
MOD's are so player dependent you need to look for what you like best before you can make a decision.
My suggestion before anything els...Look for earlier posts by ppl who regained interest in SHIV and start reading this forum then check out the
SH4 Fleet Boat Mods Workshop and read some more.
I know its a pain and not a quick answer but this way you have all the knowledge you'll need to ask the right questions.
GL and don't give up!!