Not sure how IMRC module got into your work order since you didn't mention it in prior post.
However, both the exhaust manifolds (c/w pre-cats) and the main cat are covered in US for 8yr/80k mile warranty (8yr/130k km in Canada, 7yr/70k miles in California) and you should not have had to pay any of that cost. Recall mentioned previously applied to earlier ('95-early '96)Contiques and required relacement of both manifolds and main cat. Subsequent problems and those encountered in other model years covered by emissions warranty. Rental not included (unless perhaps if you have an ESP).
Suggest you return to dealer for full and frank discussion of what was done and why it wasn't totally covered under the warranty. BTW, I presume that CEL code was P0420 - Catalyst System Efficiency Below Threshold (Bank 1).
IMRC module replacement sounds like 1 hr + parts.
I had both my Contour's manifolds replaced in May at 129,900km n/c. Parts were about $1200(list), labour 4.2 hrs.
