i find the crontabs to work very nicely... that way you don't have to mess with your System folder... and you don't have to start it manually.
Actually, I did a dangerous thing to make it startup with MacOS X before I learned about crontabs:
I modified the text file for the Directory Services item in Startup Items... at the very bottom, I add one line:
/dnetc/dnetc -quiet
worked like a charm, you just have to download the RC5 client and set it up in the directory you want *as root*, otherwise, it might not work.
I even had it display a message saying "RC5 startup" in the OS X startup sequence.
However, once I realised how easy crontabs where to set up... I did it that way, it's much less nerve racking.
FYI: To set up RC5 using crontabs
#1 Login to MacOS X as whoever (this procedure does not require root). Download RC5, and run it in the Terminal. In the first configuration option, set a time limit of 55 minutes (00:55)
#2 Using BBEdit (make sure it's set to save files with UNIX linebreaks), type the following line.
00 * * * * /Applications/dnetc/dnetc -quiet
(explanation, don't type this in: this line will make the OS X start RC5 whenever whenever the clock minutes is 00. So at the top of ever hour. The believe the other fields are, from left to right, "any" hour, "any" day, "any" week, "any" year. As for the actual command... just make sure the path is pointing to where you have the RC5 program.
#2(b) There is only one trick to making a "crontab" file.... the spaces in between each setting (ie. 10 * * * * /Applicblah/dnetc -quiet) have to be
TABS!. Don't use the space bar... it won't work. Also, make sure BBEdit is set to save files with UNIX linebreaks... it won't work with Mac breaks. Now save that file as "crontab" in your Home directory (it doesn't really matter... but that's easiest).
#3 In Terminal, open a new window... go to the directory where you saved your crontab file, if you put it in your Home directory, you shouldn't have to do anything.
#4 Type:
crontab crontab
(That tells the application "crontab" to look for the file you created called "crontab")
#5 To make sure it worked type:
crontab -l
(That's a lowercase "L". This will list any directions the crontab application has... you should see the entry you typed.)
There!!
You're done! Now just wait until the top of the hour, open up CPU Monitor, and make sure it pegs at 100%.
NOTE: you don't have to set it to "00", for "immediate gratification", I just set the minutes value to 2 minutes after I'm working on it... that way I don't have to wait until it's over. (So for example, it's 11:19 right now, so I would set the minutes to 22)