Including extensions in my application JAR

Hi. I have an application in a JAR-file the uses some extension classes also found in a JAR-file. To run my application I have to put the extension JAR-file in ...\JavaSoft\JRE\1.3.1\lib\ext\.
I would like to be able to distribute my application in a single JAR-file. Can this be done by for example including the extension JAR in my application JAR? (And how?)
Help appreciated, thanks!

i have a similar problems to this one
1)
problem is ... i jus downloaded JRE 1.4.2 .. i also have JRE 1.4.1_03 .. when i select JRE 1.4.2 .. it doesnt download the required requird JAR file no popup is shown the applet loads succesfully but obviously doest run becoz the requird JAR file was not installed. but when i use the older JRE 1.4.1_03 it shows the popup for download and installs the JAR file in the lib/ext .. can n e one help me on this?
2) another prblem is after downloading the JAR in JRE 1.4.1_03 ..
i have an applet that uses another JAR file that is of about 1.5 MB ... i want it to get this JAR installed on the client when the client first time access the WebPage
the problem is that it downloads the first time and get installed and runs fine but when i refresh the page or visit the site again .. it downloads again so its useless i jus want it to download once
i guess theres sum setting in the mansifest file or sumthin ??
n e help in this regard wud be much appriciated
faraz!

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(I'm on Mac OS 10.4, but this should work anywhere)
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others time, drop me a e-mail if this was at all
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