Dear Neal,
Details for preparing cells in agar for paraffin embedding, are for example 
described by Harold Kerstens et al. in J Histochem Cytochem 48:709-718, 2000.
I hope this is what your colleges are looking for.

Chris van der Loos
Dept. Cardiovascular Pathology
Academic Medical Center H0-120
Meibergdreef 9
NL-1105 AZ Amsterdam
The Netherlands

Neil Hand wrote:
 >Date: 4 Dec 2002 02:56:47 -0600
 >From: Neil Hand 
 >Subject: IHC in agar
 >I am looking on behalf of a colleague details/protocols of methods for
 >preparing cells in agar for IHC. Direction to a suitable web site would be
 >acceptable. I do not have any details regarding the sample(s).
 >
 >Thanks in advance.
 >
 >Neil Hand,
 >Histopathology Dept.,
 >Queens Medical Centre,
 >Nottingham NG7 2UH,
 >England UK