AT5 will work fine for this. Because this is a 9 year old unit, you'll want to be careful about how much data you put in the chart, you'll probably need to create the file as AT5 version 7 (10 might work), and the SD card may be difficult to find that works with the unit (must be standard MMC with at most 1 GB of storage space).
The only old units the IMC will not work with are anything that runs on a true monochrome display.
