Here's a few links to good tips on setting up Jags & JMs (applies to an extent to Mustangs, Jagstangs & Jagmasters as well)
http://www.webrocker.de/jaguar/2004/index.php?page=goodies_geek&show=setup http://www.webrocker.de/jaguar/2004/index.php?page=goodies_geek&show=jag_setup_ar http://www.webrocker.de/jaguar/2004/index.php?page=goodies_geek&show=tremloc and if you ever need parts:
http://www.angela.com is about the only place in the world - literally - that stocks current Fender US vintage reissue pickups for Jazzmasters & Jaguars: do your Japanese-made Jag/JM a *big* favour!!
and
http://www.guitarpartsresource.com has replacement pickguards, trem arms etc for both US and Japanese models (and they are differently sized, so beware!)