Here's the code I use to handle the situation where a user installs to a different directory than the one on which I created the app. It's a .prg to which you pass a dataenvironment. It sets the Database property of all cursors in the DE to the current directory plus \Data, and opens that database. It should be modifiable for your needs.

* changes cursors' Database property to current directory + \Data
* opens the database
lparameters toDE

Assert Type("toDE.Name") == 'C'
if !(Type("toDE.Name") == 'C')
return
endif
Assert Upper(toDE.Class) == Upper("DataEnvironment")
if !(Upper(toDE.Class) == Upper("DataEnvironment"))
return
endif

* get all the cursors in the Data Environment
local laCursors[1]
AMembers(m.laCursors, toDE, 1)

* iterate through each cursor
local llFirst
llFirst = .T.
local ln
for ln = 1 to ALen(laCursors, 1)
* skip non-objects
if !laCursors[ln, 2] == "Object"
loop
endif

* get the object name
local lcObject
lcObject = "toDE." + laCursors[ln, 1]

* change the path to the database to the current folder + \Data
if Eval(m.lcObject + ".Class") == "Cursor"
Local loCursor
loCursor = Eval(m.lcObject)
loCursor.Database = Sys(5) + Sys(2003) + "\Data\" +;
JustFName(loCursor.Database)

if llFirst
open database (loCursor.Database)
llFirst = .F.
endif
endif
endfor