I wished to create raster maps, consisting from a base map and more transparent layers. SAS.Planet enables to create map from one base map and one map layer only. I decided to create an add-on tool for SAS.Planet, which generates tile cache of merged base map and one map layer. Such tile cache can be subsequently used as base for adding another layer.
You can find more information about the merging process here: http://bogi.gpsforum.sk/documents/SASmerge_english.pdf
Download the SASmerge tool: http://bogi.gpsforum.sk/tools/SASmerge.rar
I understand and can read Russian, but it is very hard for me to write in Russian language. Feel free to answer in Russian language.