A11 Controller described an MVA separation concern involving slow climbing aircraft that require multiple vectors to comply with MVA requirements; noting filed and/or assigned routing should be altered.

Narrative

Air Carrier X departed ANC filed V440 MCG at 100. The Air Carrier X was vectored North and South of V440 in an 'S' pattern to gain altitude due to an extremely slow rate of climb to 10;000. The Air Carrier X was 4.5 nm South of IVANN in a 2;000 FT MVA at approximately 4;400 heading 320 and told to join V440. The pilot of the Air Carrier X informed me that he was unable to meet the crossing restriction at IVANN of 5;000 FT. I acknowledged and then vectored the Air Carrier X away from IVANN to the Northeast and then back to a 230 heading to join V440 at IVANN as the aircraft was approximately 5;100 FT and climbing. Pilot acknowledged. I then turned my attention to another aircraft and then I noticed the Air Carrier X approximately 3nm North of IVANN not on V440 but on an approximate 270 degree heading entering the 5;900 FT MVA at 5;300 FT. I informed the Air Carrier X that he was not on V440 and North of IVANN. The pilot acknowledged and I instructed him/her to join V440 from a 260 heading and resume own navigation. Pilot did not take vector to join airway at IVANN. Slow climbing aircraft should file alternate route or be assigned a PDR route to keep the aircraft in lower MVA/MEA's. Controllers should not have to give excessive vectors and attention to aircraft because they can not perform normal rates of climb.