Merging Multiple POI files??

I am a truck driver for a large supermarket chain and a number of us drivers are trying to compile a list of all the stores we deliver to by storing them as a poi on our tt's. I would just like to know if I could merge multiple poi files to make 1 poi file for us all to use when we have all the data stored! Any help would be appreciated........ oh, if this is possible what do i need and where can i get it??

There is a few sites that offer this service to join the POI files here is 1 below, altho i have not tested this method of joining them so remember to back them up first, But please report back here your findings for others to learn from
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Thanks for that djc!!

I will have a search to find editing tools aswel.

Another editing tool. [Please Register or Login to download file]

Cheers......Just downloaded that and also Extra_poi_Editor.