I remember
when I upgraded the ROMs in my C1P
 and got a RENUM command.  Ah, those were the
 days. 
 There were two common tricks that renumber commands never dealt with:
 1) storing line numbers in variables and GOTOing or GOSUBing them,
    e.g., GOSUB MYSUB
 2) computing line numbers at the time of GOTO or GOSUB,
    e.g., GOTO (X+3)*35
 Did the C1P let you do either of those tricks? 
 
I'll have to stretch my brain, as all of my stuff is behind a stack
of drywall just now.  Hmmm...   I don't seem to remember doing
either of those tricks.  The Microsoft 8K BASIC in ROM was
pretty simple...  I'm sure that somebody will correct me if I'm
wrong.
Bill Sudbrink