A longer IDE cable will not help in any way with a player being mounted at an angle where the front face is higher than the rear -- the extra long cables help mostly with level situations and with rough handling in general.

That said, anyone with a 2-drive player should replace the cable with a longer one to relieve stress on the IDE header. And anyone with a 1-drive player should move the single drive to the second bay, such that it plugs into the end of the factory (or replacement) cable rather than the middle.

Cheers