Alright, thanks for your answer. I could download and install frontpage-5.0-72psa.fc4.i586.rpm.
Now, I can see the options to setup the frontpage extension in the PSA Admin interface. But I can't get it to work properly: when I try to access FP Webadmin (http://www.domain.tld/_vti_bin/_vti_adm/fpadmcgi.exe?page=webadmin.htm), I get a 404.
In the logs of the concerned domain, I can see this:
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File does not exist: /var/www/vhosts/discovery.ch/httpdocs/_vti_bin/_vti_adm/fpadmcgi.exe
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And the needed file is located at:
/usr/local/frontpage/version5.0/exes/_vti_bin/_vti_adm/fpadmcgi.exe
When I try to open the website from Frontpage, it doesn't work also... And the logs show this error:
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File does not exist: /var/www/vhosts/discovery.ch/httpdocs/_vti_bin/shtml.exe
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And the needed file is located at:
/usr/local/frontpage/version5.0/exes/_vti_bin/shtml.exe
I've the same problem on another host with an updated version of Plesk (8.0 to 8.1 on a FC2). On this one, I didn't have to install the extension.
I think that I have to point domain.tld/_vti_bin/ to the frontpage installation directory (/usr/local/frontpage/version5.0/exes)... But I can't figure how to to this.
Any idea on how to resolve this problem?
************UPDATE************
Wooooooow! BIGGER PROBLEM... I thaught about restarting Apache, and then:
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$Starting httpd: httpd: Syntax error on line 205 of /etc/httpd/conf/httpd.conf: Cannot load /usr/lib/httpd/modules/mod_frontpage.so into server: /usr/lib/httpd/modules/mod_frontpage.so: undefined symbol: apr_filename_of_pathname
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It seems that Apache don't like the mod_frontpage.so...