How can i make my application startup faster?

Anyone can help me?
I'm making a GUI application for my customers, this application must be run in many old machines, which install win98,128M memory.
The first time application start cost 15sec(5 sec before start to load class),My customer say "can't stand for it ", because they use VC version beforetime. :-(
The second time start, it cost 6.5sec(1sec before start to load class), My customer say "that's ok".
To improve, i make a monitor tool, which use swing lib and some of my own libs, the monitor startup with the win98, and runing as a service. Now the application's first start only cost 6.5sec, just like the second time start.
But new problem come: After i do many operation which cost many memory(start a msoffice word, many copy/paste, and close the word), my application start time cost 17 sec! 6 sec before load class!
What can i do now?
Thanks in advance,
luochangtao

(windows98 128M)
the first time:
total 15sec
5sec before inter my first class, and about 6sec for first swing window, the other is for load my resources.
the second time:
total 6sec
0sec before inter my first class, 2sec for first swing window. the other is for load my resources.
I think i have do enough for my app, but if the first time after system startup, or user do many operation's which cost many memory before second time start, it cost 15sec, and about 5sec form click the batchfile to inter my first class.
i think windows 's catch mechanism is important, but i don't know how to keep that catch.
is it possible?

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