HexCheats:
 To find what your looking for in the save games folder 
 of Z:SS you'll find files of the 'sz2' variety. 
 NOT the 'sz2.snf' file. Take this file '?????.sz2' and 
 open it with "HexEdit" by Geoffrey Prewett. 
 Then search for the floating point value of 10,000 for 
 the first scenario save. To search with hex the look for 
 the code 00401C46 and right beside it will be another 
 00401C46 and the a few numbers down the row you'll find 
 it again. 
 This is where the 10,000 credits are for the first scenario 
 game save. 
 
 Change ALL 3 of these values to 00247449 and you'll have 
 1,000,000 credits when you return and reload this game. 
 Remember not to change only one or two of the above locations 
 or it won't work. You have to change all 3. 
 
 Below is a list of the even credits from 10,000 on up to 15,000: 
 
 10,000 = 00401C46 
 11,000 = 00E02B46 
 12,000 = 00803B46 
 13,000 = 00204B46 
 14,000 = 00C05A46 
 15,000 = 00606A46 
 
 If you want more of the above then goto the web and find 
 HexEdit, dowload it and use it. To find the floating point 
 value download WinHack and use its calculator feature which 
 has the float integer value which is where you put the value 
 and in the float hex value you'll see the code OF COURSE 
 backwards.