Software for synthesis

Hi every body, I tried to make a P&R with ISE 5.2 and i saw that there is no XC4000 target possible. Is there a library i have to download or do i have to look for an old version of Xilinx tools. If so what is the last version and tool that will be capable of making P&R for and XC4003A and an XC3020A Thanks

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ouadid
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