well it depends how far you wanna go and if u wanna spend money on it. if it was me and i wanted to mod it i would only go one way... VIP

basic stuff would just be get some nice big bling bling rims and dump it on its ass
maybe a tint job.

if you wanna go further:
- i've seen a few of these done up in japan so there may be a few kits available but as i said it might be a lil hard to find.
- deep dish 20's
-airbag(air cylinder) it
-respray with big kandy flakes
-leather interior/retrim dash
-nice dark tint
-nice exhaust, maybe something like a dtm style (cant be too big if gonna airbag it)
-find someone that can refresh the taillights and headlights (maybe convert to some from a newer car)
-shave badges and maybe door handles

i know its a very blinged out list and that would be a lot of money down the drain but you asked my suggestions =P

if you did this up alot you would have an incredibly unique car