BUBBA DRIVER WAS ON THE LAM A Pakistani national who had dropped off the feds' radar screen for six years popped up last week - behind the wheel in a presidential motorcade. Shahzad Qureshi, 42, was in one of three cars awaiting ex-President Bill Clinton at Newark Airport on Tuesday when a Port Authority cop checked licenses and found his Immigration and Naturalization Service warrant. After Qureshi had skipped a residency-status hearing in 2000, a deportation order was issued. He's being held pending INS processing.