Xen devel - Feb 2010 - howto install multiple, concurrent versions of Xen4?

i''m running opensuse 11.2. concurrent install of multiple kernels is no
problem.

i''ve installed opensuse''s xen4 from rpm

  rpm -qa | grep -i ^xen
   xen-tools-4.0.0_20873_01-29.1.x86_64
   xen-4.0.0_20873_01-29.1.x86_64
   xen-libs-4.0.0_20873_01-29.1.x86_64

which installs,

	ls -al /boot | grep " xen"
		-rw-r--r--  1 root root   672804 2010-01-29 13:11 xen-4.0.0_20873_01-29.1.gz
		lrwxrwxrwx  1 root root       26 2010-02-03 18:32 xen-4.0.gz ->
xen-4.0.0_20873_01-29.1.gz
		lrwxrwxrwx  1 root root       26 2010-02-03 18:32 xen-4.gz ->
xen-4.0.0_20873_01-29.1.gz
		lrwxrwxrwx  1 root root       26 2010-02-03 18:32 xen.gz ->
xen-4.0.0_20873_01-29.1.gz
		lrwxrwxrwx  1 root root       28 2010-02-03 18:32 xen-syms ->
xen-syms-4.0.0_20873_01-29.1
		-rw-r--r--  1 root root 10451302 2010-01-29 13:11 xen-syms-4.0.0_20873_01-29.1

its relevant dirs, configs, bins, etc are in "all the usual places"
... /etc/xen, /var/lib/{xen/,xend/, xenstored}, etc.

for testing/debugging pvops+xen-unstable on opensuse, and in
comparison to its repo-based install, i''d like to do a parallel, fully
independent install of upstream''s Xen4 from source on the same box.

to that end, i''ve

vi xen-unstable.hg/xen/Rules.mk
  ...
  -	TARGET := $(BASEDIR)/xen
  +	TARGET := $(BASEDIR)/xen-upstream
  ...

and @ build,

  make -j8 PREFIX=/usr/local/xen-upstream install-xen install-tools

i end up with,

	ls -al /boot | grep upstream
		-rw-r--r--  1 root root   660724 2010-02-03 21:56
xen-upstream-4.0.0-rc3-pre.gz
		lrwxrwxrwx  1 root root       29 2010-02-03 21:56
xen-upstream-4.0.gz -> xen-upstream-4.0.0-rc3-pre.gz
		lrwxrwxrwx  1 root root       29 2010-02-03 21:56 xen-upstream-4.gz
-> xen-upstream-4.0.0-rc3-pre.gz
		lrwxrwxrwx  1 root root       29 2010-02-03 21:56 xen-upstream.gz ->
xen-upstream-4.0.0-rc3-pre.gz
		-rw-r--r--  1 root root  9799389 2010-02-03 21:56
xen-upstream-syms-4.0.0-rc3-pre

so that''s nicely separated, and,

	ls /usr/local/xen-upstream/
		bin/  etc/  include/  lib/  lib64/  sbin/  share/

	ls /usr/local/xen-upstream/{etc/init.d,sbin/xend}
		/usr/local/xen-upstream/sbin/xend

		/usr/local/xen-upstream/etc/init.d:
			xend  xendomains

	etc etc

i can, of course, start the ''upstream'' services from this
tree, but
they still seem to expect configs, scripts, dbs, etc in the default
locations -- i.e., it''d share the existing install''s data.

i can patch code in src to look in other locations, but that''s not
ideal.  what''s the RIGHT way to completely isolate the 2nd install,
and have its bins look for data/config in a uniques/specified
location?  is a set of make params correct/sufficient?

thanks.

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