Help on wiring

This can be very confusing =). i've installed a cd/radio player last time into my car and it was stolen. so i don't have any manuals on that particular radio. anyway, i bought a new player(OEM version) and wired it up. however, there's one old orange wire( connected  to the old fuse box) which i can't  seem to fix on my new player. the speakers sounded ok.  that's the first problem.

the 2nd problem is, when i turn on my engine or the power to the player, it makes a blast sound from the speakers . on top of that, when the cd starts to be read or searching for a track, it has the reading sound from the speaker. can't readlly describe to you guys but it's like crackles. =)

guess that's about all of the wiring problems.  thanks =)

it's a volvo  240 and clarion head unit. anyway. i've figured it out, the extra wire is just a constant wire. my player doesn't have an input for it.

the popping sound still persist whenever the player is turned on. sigh...