My reading of the regulations is that instrument time can be logged in any IFR-equipped aircraft OR an approved simulator. Also passing an I.R. test within the last 90 days negates the remainder of the minimum recency requirements.
In the situation you describe where you appear to be outside 90 days your safest option would be to either get current in an approved simulator, or carry a current and appropriately-rated IFR pilot as a safety pilot while you log the necessary time. Just leaping alone into the ether and going IMC/PIFR after a long lay-off would be a baaad idea.
I don't think it has to be a twin, but stand being corrected by those more up with the whole single-engine and PIFR scene.
Last edited by Mach E Avelli; 20th May 2013 at 23:59.