Get creative. You can delete a lot of the extra folders on a win2k cd. That\'d give you some extra room. Then see about copying a win98 cd to its own directory. When it asks for the previous windows cd, try pointing it to the correct directory. If it works, then you\'ll still only have to have one cd, and it\'ll only take one extra step.
Otherwise, just get a fullversion copy of win2k, and do the no serial edit on it. That way you won\'t be using the \"wrong\" key on it, since you won\'t be using a key at all. If anyone does an audit (assuming you\'re doing this for a business, if it\'s just for you I don\'t think anyone\'ll care), just make sure you keep your win2k and win9x license handy, so you can have proof it\'s a legit install.