You may delete the recovery partitions but first you must burn a set of recovery dvd's. (You should already have done this anyway!) The recovery partition is your only means of recovering your system in the case of a catastrophic disk failure or other serious problems which may render your system unbootable. You may also need to run a recovery if you ever decide to sell the machine on. Having burned a set of recovery disks make a second copy and keep them in separate places (no I'm not paranoid - I had just too many experiences of desperately need to run a recovery only to find a crc error on the optical recovery disk! Once you have done that use something like easeus partition manager (free download) to delete the recovery...