Changing my PHP user authentication program from MySQL to mSQL was easy - a simple perl script:

s/mysql/msql/g;

changed almost every MySQL function into its mSQL counterpart - except for two changes I had to make manually

mysql_field_name --> msql_fieldname
mysql_field_len --> msql_fieldlen

For compatibility, would you consider making "msql_field_name" and "msql_field_len" functions?  (I don't know if those are the only two functions whose mSQL/MySQL names do not follow the same naming convention - they're the only two I found though). 

Just a (low-priority) thought.